You left the ^ off your Z2

Let X1,...,Xn be from a

A) Find the Joint complete sufficient statistics for and

B)Find an MVUE for

C)Find an MVUE for

a)From a previous problem we did in class, I know and are Joint complete sufficient statistics for and

b)Let which is the sample variance.

Would or would it be

c)Let and

Therefore is an MVUE for according to Lehmann and Scheffe Theroem.

Did I make a mistake somewhere, and would or would it be